78923167 has 2 divisors, whose sum is σ = 78923168. Its totient is φ = 78923166.

The previous prime is 78923161. The next prime is 78923171. The reversal of 78923167 is 76132987.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78923167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78923161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39461583 + 39461584.

It is an arithmetic number, because the mean of its divisors is an integer number (39461584).

Almost surely, 2^78923167 is an apocalyptic number.

78923167 is a deficient number, since it is larger than the sum of its proper divisors (1).

78923167 is an equidigital number, since it uses as much as digits as its factorization.

78923167 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 43.

The square root of 78923167 is about 8883.8711719610. The cubic root of 78923167 is about 428.9448928804.

The spelling of 78923167 in words is "seventy-eight million, nine hundred twenty-three thousand, one hundred sixty-seven".